|Publication number||US5035472 A|
|Application number||US 07/540,733|
|Publication date||Jul 30, 1991|
|Filing date||Jun 20, 1990|
|Priority date||Jun 20, 1990|
|Publication number||07540733, 540733, US 5035472 A, US 5035472A, US-A-5035472, US5035472 A, US5035472A|
|Inventors||Charles L. Hansen|
|Original Assignee||The United States Of America As Represented By The Secretary Of The Army|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (98), Classifications (14), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The invention described herein may be manufactured, used, and licensed by the U.S. Government for governmental purposes without the payment of any royalties thereon.
The present invention relates to an integrated electro-optical weapons sight, and especially to a multispectral sight integrated with a weapon which may be used either in daytime, twilight, or nighttime environments without changing the sight.
2. Prior Art
Daytime optical small weapon sighting is presently conducted by a variety of telescopes. A case in point is the Leopold and Stevens Ultra X-3 rifle sight used on the U.S. Army's M-24 sniper rifle. The daytime performance of this sight is acceptable. However, this sight must be dismounted from the rifle in order to mount a sight with a different spectral response for other than daytime sighting, such as the near infrared and far infrared spectrums used respectively in the U.S. Army's image intensifiers (I2) and the forward looking infrared (FLIR) viewers.
Boresight accuracy may not be maintained during field mounting and dismounting when various single spectrum sights or viewers are used in a mission requiring multispectral observation. The total size and weight if all three sights are mounted on a weapon at the same time can become excessive and adversely affect the success of a military mission.
The present invention is comprised of a multispectral sight which has a plurality of multispectral optical and electrical elements attachable in at least three distinct spectrum processing channels between common objective and eyepiece optics which are enclosed within a unitary housing that is permanently molded onto a U.S. Army rifle or some other man portable type weapon. The molded housing preferably replaces the normal forestock and shoulder stock and the trigger housing therebetween. The housing has an elongated opening on the top through which the multispectral optical and electrical elements and objective and eyepiece optics are attachable to an optical bench which is attached to the man portable weapon. The multispectral sight is boresighted with the weapon and the elements secured tightly so as not to jar loose later. The elongated opening may be hermetically sealed by a sighting window and an access cap. Prior to the window and cap being hermetically sealed, the internal portion of the housing is preferably pressurized with nitrogen gas to prevent moisture or outside matter from contaminating the optical and electrical elements.
The housing has a sequential rotary switch on the exterior thereof for selectively switching on a processing means for each of the three distinct spectrum channels. These spectrums are preferably a visible spectrum for daytime viewing, a near infrared spectrum for twilight viewing, and a far infrared spectrum for thermal viewing at nighttime. A plurality of thumb nail rotary switches on the exterior of the housing controls the reticle brightness and the scene contrast and brightness. There are other exterior controls for adjusting the focus and for windage and elevation.
The invention will be understood by reference to the following detailed description in view of the drawings.
FIG. 1 illustrates a sniper rifle on which the multispectral sight is mounted within a detachable housing;
FIGS. 2A, 2B, and 2C are views of the detachable housing of FIG. 1 respectively by angled side view, front objective end view, and top view;
FIGS. 3A and 3B illustrate respectively a side elevational view of a rifle having a unitary housing for the multispectral sight permanently molded thereon and a top view of the unitary housing;
FIG. 4 is a schematic of the electrical and optical elements of one embodiment of the multispectral sight; and
FIG. 5 is a schematic of the electrical and optical elements of a second embodiment of the multispectral sight.
Refer to FIGS. 1, 2A, 2B, and 2C for perspective views of a unitary housing 10 mountable on a sniper rifle 8, which can house the same multispectral sight as can the molded housing 11 as an integral portion of a combat rifle 9, as shown by FIGS. 3A and 3B.
The multispectral sight unitary housing 10 may be mounted on the sniper rifle 8 in the usual manner, such as by coupling brackets or attaching at least two bands around both 10 and 8. Housing 10 has a top cover 10A through which the multispectral sight may be secured within 10 and then 10A is hermetically sealed to 10 after the sight has been boresighted with the rifle. Housing 10 has an objective optics end 14 and an eyepiece optics end 12. A rotary switch 30 may connect to electrical contact 31A for activating the visible spectrum of the multispectral sight, contact 31B for activating the near infrared spectrum, contact 31C for activating the far infrared spectrum, or contact 31D for activating both the near infrared spectrum and the far infrared spectrum simultaneously. A plurality of thumb nail rotary switches 36, 34, and 32, which are partly recessed in housing 10 to prevent inadvertent turning, respectively adjust scene brightness, contrast, and the brightness of the reticle. Other control knobs are knob 40 for adjusting the focus, knob 42 for azimuth control, and knob 44 for elevation control.
FIGS. 3A and 3B should now be referred to for an illustration of the molded housing 11 used to integrated the multispectral sight (not fully shown) on rifle 9. Preferably, an optical bench (not shown) is first attached to rifle 9 and then housing 11 is molded over the optical bench forming the shoulder stock 9A and the forestock 9B, including the trigger housing and upper sight portions therebetween, onto rifle 9. The sighting window 15 and sealable access cap 11A are not placed on the opening on top of 11 until the various optics and the multispectral optical and electrical elements of the sight are mounted therethrough on the optical bench. A battery power source 20 is used to power the electrical elements. Leads from source 20 are fed through housing 11 to be power the electrical elements. Leads from source 20 are fed through housing 11 to be connected to the electrical elements. Even though 20 is shown in the shoulder stock 9A it may be at any convenient location within housing 11. The sighting window is elongated and sloping to cover the full field of view of the sight.
Items 30, 31A, 31B, 31C, 31D, 32, 34, 36, 40, 42 and 44 are shown on the left side of housing 11 for convenient manipulation by a person firing rifle 9 from the right shoulder. These items may also be placed on the right side for a person firing rifle 9 from the left shoulder. Also, the position of these items on either side are not limited to the positions shown in FIGS. 3A and 3B.
FIGS. 4 and 5 are schematic block diagrams of the optical and electrical elements forming the multiple spectral channels between the objective optics and the eyepiece optics. It should be noted that FIGS. 4 and 5 only differ in the two embodiments of the objective optics. The multispectral radiant energy 6 from a typical scene enters the sight through sighting window 15 and through objective lens 14A along an objective optics common optical axis 19. A first partially reflective beam splitter 16A, preferably made of germanium, passes the 3um through 5um and the 8um through 14um wavelengths of radiant energy of interest along a far infrared spectrum channel 19A for processing. Beam splitter 16A reflects the shorter wavelength visible and near infrared spectrums to a second partially reflective beam splitter 16B which passes the near infrared spectrum of 0.7um through 1.1um radiant energy of interest which is reflected off a first fully reflective mirror 16C along a near infrared spectrum channel 19C for processing. Beam splitter 16B reflects the visible spectrum of 0.5um through 0.8um through 0.8um radiant energy of interest along a visible spectrum channel 19B for processing. The visible spectrum channel 19B, and the near infrared spectrum channel 19C are optically parallel with the far infrared spectrum channel 19A. All three channels have separate processing means and means for activating to process their respective radiant energy spectrums and whose processed signals exit therefrom along a common eyepiece optical axis 19D for an observer to view through eyepiece lens 12A.
A battery power source 20, which has appropriate voltage of say 26 volts d.c., is used for activating the electrical elements within all the spectrum channels. The far infrared spectrum channel operates as a nighttime sight and is comprised of the readily available U.S. Army forward looking infrared sight electro-optic elements as processing means. These elements are an imager lens 17 which collimates the infrared spectrum onto an uncooled focal plane array 18 controlled by focal plane array electronics 24 in which the far infrared spectrum is converted to equivalent electrical signals which are in turn fed directly to a cathode ray tube display 26 for reconverting the electrical signals to the visible spectrum at the output of 26. The visible spectrum from 26 is reflected off a fourth partially reflective beam splitter 56, which is red reflective, positioned along axis 19D for passage through eyepiece lens 12A to an observer. The far infrared spectrum processing means, i.e. elements 18, 24, and 26, may be switched on by rotary switch 30 rotated to contact 31C or combined with the near infrared processing means by being rotated to contact 31D.
The visible spectrum channel 19B operates as a daytime sight wherein the visible spectrum channel 19B optical axis is in direct alignment with the eyepiece optical axis 19D. A shutter means in the form of a light control valve 50 is used in the processing means of the visible spectrum. Valve 50 is on the visible spectrum channel 19B optical axis past the visible image plane for proper focus of the visible image at the input thereto. Value 50 may be a liquid crystal cell with power from power source 20 switchable thereto by rotary switch 30 connected to contact 31A to pass the visible spectrum therethrough or to block the passage of the visible spectrum therethrough if switch 30 is not connected to contact 31A. When the visible spectrum passes through 50 it passes directly through a third partially reflective beam splitter 54 and 56 and 12A for observation.
The near infrared spectrum channel 19C operates as a twilight sight which overlaps with the visible spectrum, i.e. down to the 0.7um wavelength. The processing means is preferably by a U.S. Army third generation image intensifier tube 28 which amplifies and magnifies the near infrared image at the input thereto. A second fully reflective mirror 52 at the output of 28 reflects the magnified near infrared radiant energy therefrom onto beam splitter 54, which is green reflective, positioned at the output of 50 along the common eyepiece optical axis 19D with 56 and 12A for viewing by an observer. Rotary switch 30 activates 28 when 30 is connected to either contacts 31B or 31D.
The thumb nail switches 32, 34, and 36 function as follows. Switch 32 adjusts reticle brightness by adjusting the power from 20 to the reticle generator 22 which in turn feeds directly to 26 for observation. Switches 34 and 36 control the power to 28, 18, 24, and 26 to respectively control the scene contrast and brightness. Knobs 40, 42, and 44 adjusts the focus, the azimuth or windage, and the elevation in the usual manner.
FIG. 5 illustrates another objective optic which may be used in some circumstances of indirect viewing, that is periscopic viewing, using the multispectral sight. In this embodiment the incoming radiation 6 after passing through the sighting window 15 is passed through a multispectral beam splitter 58 onto a parobolic reflector optic 60, which may be reflective or refractive, and is retroreflected from 60, off 58 and through objective lens 62 and off a third fully reflective mirror 64 and along a common objective optic common optical axis 19 toward the first partially reflective beam splitter 16A and proceeds as in the embodiment of FIG. 4.
The present multispectral sight provides a light weight, 24 hour per day, all weather electro-optic device for use by the military in a sighting system.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US4040744 *||Oct 5, 1973||Aug 9, 1977||General Dynamics||Multiple spectrum co-axial optical sight and closed loop gun control system|
|US4669809 *||Jun 10, 1985||Jun 2, 1987||Societe De Fabrication D'instruments De Mesure||Optical aiming assembly, for designating and for tracking a target|
|US4707595 *||Dec 29, 1986||Nov 17, 1987||Meyers Brad E||Invisible light beam projector and night vision system|
|US4732438 *||May 8, 1986||Mar 22, 1988||Elbit Computers Ltd.||Split-image optical viewing instrument|
|US4822994 *||Sep 23, 1987||Apr 18, 1989||Itt Electro Optical Products A Division Of Itt Corporation||Small arms sight for use during daylight and nighttime conditions|
|US4902128 *||Sep 3, 1986||Feb 20, 1990||Hughes Aircraft Company||Apparatus for harmonizing a plurality of optical/optronic axis of sighting apparatus to a common axis|
|US4917490 *||Feb 4, 1988||Apr 17, 1990||The Boeing Company||Boresight alignment measuring apparatus and method for electro-optic systems|
|US4961278 *||Mar 17, 1989||Oct 9, 1990||Itt Corporation||Day/night telescopic sight|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US5295017 *||Aug 27, 1992||Mar 15, 1994||Bio-Rad Laboratories, Inc.||Sample masking using wavelength-selective material|
|US5497266 *||Jul 27, 1994||Mar 5, 1996||Litton Systems, Inc.||Telescopic day and night sight|
|US5555324 *||Nov 1, 1994||Sep 10, 1996||Massachusetts Institute Of Technology||Method and apparatus for generating a synthetic image by the fusion of signals representative of different views of the same scene|
|US5892617 *||Jul 28, 1997||Apr 6, 1999||Wallace; Robert E.||Multi-function day/night observation, ranging, and sighting device and method of its operation|
|US5907150 *||Jul 28, 1997||May 25, 1999||Saldana; Michael R.||Multi-function day/night observation, ranging, and sighting device and method of its operation|
|US6072565 *||Oct 14, 1998||Jun 6, 2000||Litton Systems, Inc.||Night vision device with improved laser range finder|
|US6094302 *||Mar 20, 1997||Jul 25, 2000||Celsiustech Electronics Ab||Sight comprising IR camera and having a large observation area|
|US6094304 *||Jul 28, 1997||Jul 25, 2000||Litton Systems, Inc.||Multi-function day/night observation, ranging, and sighting device and method of its operation|
|US6111692 *||Jul 28, 1997||Aug 29, 2000||Litton Systems, Inc.||Multi-function day/night observation, ranging, and sighting device and method of its operation|
|US6114683 *||Mar 2, 1998||Sep 5, 2000||The United States Of Ameria As Represented By The Administrator Of The National Aeronautics And Space Administration||Plant chlorophyll content imager with reference detection signals|
|US6121600 *||Jul 28, 1997||Sep 19, 2000||Litton Systems, Inc.||Integrated night vision device and laser range finder|
|US6131294 *||Sep 1, 1998||Oct 17, 2000||Hakko Co., Ltd||Telescopic sight with detachable night vision apparatus|
|US6563592||Mar 19, 2001||May 13, 2003||The United States Of America As Represented By The Secretary Of The Army||Interferometric alignment device|
|US6747821||Jun 4, 2003||Jun 8, 2004||Litton Systems, Inc.||Method and system for mounting a detector|
|US6762884||May 30, 2003||Jul 13, 2004||Litton Systems, Inc,||Enhanced night vision goggle assembly|
|US6810293 *||Jul 26, 2001||Oct 26, 2004||United International Engineering, Inc.||Compact integrated self contained surveillance unit|
|US6970190||Jun 11, 2003||Nov 29, 2005||Litton Systems, Inc.||Event synchronization for detector systems|
|US7053928||Mar 20, 2000||May 30, 2006||Litton Systems, Inc.||Method and system for combining multi-spectral images of a scene|
|US7092013||Jun 4, 2003||Aug 15, 2006||Litton Systems, Inc.||InGaAs image intensifier camera|
|US7211778||Oct 7, 2005||May 1, 2007||Itt Manufacturing Enterprises, Inc.||Night vision goggle with separate camera and user output paths|
|US7274830||Jun 11, 2003||Sep 25, 2007||Litton Systems, Inc.||System for multi-sensor image fusion|
|US7283307||Jul 7, 2005||Oct 16, 2007||Oasys Technology, Llc||Common aperture vision system|
|US7307793||Jul 1, 2005||Dec 11, 2007||Insight Technology, Inc.||Fusion night vision system|
|US7319557 *||Jan 26, 2005||Jan 15, 2008||Eotech Acquisition Corporation||Fused thermal and direct view aiming sight|
|US7333270 *||Jun 10, 2005||Feb 19, 2008||Omnitech Partners||Dual band night vision device|
|US7345277 *||Aug 8, 2001||Mar 18, 2008||Evan Zhang||Image intensifier and LWIR fusion/combination system|
|US7404268 *||Dec 9, 2004||Jul 29, 2008||Bae Systems Information And Electronic Systems Integration Inc.||Precision targeting system for firearms|
|US7420153 *||Dec 13, 2006||Sep 2, 2008||Xenonics, Inc.||Low-light viewing device having camera assembly with image signal containing visible light and infrared energy components and method for controlling same|
|US7459684||May 18, 2005||Dec 2, 2008||Lockheed Martin Corporation||Long-wavelength infra-red night vision goggles|
|US7483213||Mar 24, 2006||Jan 27, 2009||Omnitech Partners||Image combining viewer|
|US7640691 *||Dec 1, 2004||Jan 5, 2010||Philip B Karcher||Dual sight scope system and method|
|US7805020||Jul 25, 2006||Sep 28, 2010||Itt Manufacturing Enterprises, Inc.||Motion compensated image registration for overlaid/fused video|
|US7827727||Jul 28, 2008||Nov 9, 2010||Omnitech Partners||Night sight and method of making the same|
|US7880962 *||Mar 31, 2006||Feb 1, 2011||Robert Tartaglia||Optical and infrared periscope with display monitor|
|US8014057||Apr 9, 2009||Sep 6, 2011||Rambus Inc.||Extending the gamut color generation in a display|
|US8077376||May 15, 2008||Dec 13, 2011||Rambus Inc.||Visible plus non-visible field sequential color|
|US8336776||May 20, 2011||Dec 25, 2012||Trijicon, Inc.||Aiming system for weapon|
|US8584394 *||Dec 24, 2012||Nov 19, 2013||Kruger Optical, Inc.||Scope having focus roller|
|US8638387||Jan 25, 2012||Jan 28, 2014||Optex Systems, Inc.||Multiple spectral single image sighting system using single objective lens set|
|US8687844||Jun 11, 2009||Apr 1, 2014||Raytheon Company||Visual detection system for identifying objects within region of interest|
|US8915008||Aug 2, 2011||Dec 23, 2014||Trijicon, Inc.||Fused optic|
|US9069172||Sep 15, 2011||Jun 30, 2015||Roland Morley||Multi-mode sight|
|US9303952 *||May 8, 2009||Apr 5, 2016||Gs Development Ab||Combination sight|
|US20020030163 *||Aug 8, 2001||Mar 14, 2002||Zhang Evan Y.W.||Image intensifier and LWIR fusion/combination system|
|US20030230707 *||Jun 2, 2003||Dec 18, 2003||Litton Systems, Inc.||Image intensification camera|
|US20030231245 *||Jun 4, 2003||Dec 18, 2003||Litton Systems, Inc.||Ingaas image intensifier camera|
|US20030231410 *||Jun 4, 2003||Dec 18, 2003||Litton Systems, Inc.||Method and system for mounting a detector|
|US20030231804 *||Jun 11, 2003||Dec 18, 2003||Litton Systems, Inc.||System for multi-sensor image fusion|
|US20030234870 *||Jun 11, 2003||Dec 25, 2003||Litton Systems, Inc.||Event synchronization for detector systems|
|US20040042086 *||May 30, 2003||Mar 4, 2004||Litton Systems, Inc.||Enhanced night vision goggle assembly|
|US20040196566 *||May 30, 2003||Oct 7, 2004||Litton Systems, Inc.||Integrated display image intensifier assembly|
|US20050241210 *||Dec 1, 2004||Nov 3, 2005||Vitronics Inc.||Dual sight scope system and method|
|US20060164718 *||Jan 26, 2005||Jul 27, 2006||Eotech Acquisition Corp.||Fused thermal and direct view aiming sight|
|US20060245070 *||Jul 7, 2005||Nov 2, 2006||Oasys Technology, Llc||Common aperture vision system|
|US20070084985 *||Oct 7, 2005||Apr 19, 2007||Itt Manufacturing Enterprises, Inc.||Night vision goggle with separate camera and user ouput paths|
|US20070090277 *||Dec 13, 2006||Apr 26, 2007||Gary Palmer||Ruggedized digital low-light viewing device|
|US20070222854 *||Mar 24, 2006||Sep 27, 2007||Omnitech Partners||Image combining viewer|
|US20070229943 *||Mar 31, 2006||Oct 4, 2007||Robert Tartaglia||Optical and infrared periscope with display monitor|
|US20070235634 *||Jul 1, 2005||Oct 11, 2007||Ottney Joseph C||Fusion night vision system|
|US20080011941 *||Nov 11, 2005||Jan 17, 2008||Oasys Technology Llc||Aviation night vision system using common aperture and multi-spectral image fusion|
|US20080025640 *||Jul 25, 2006||Jan 31, 2008||Itt Manufacturing Enterprises, Inc.||Motion compensated image registration for overlaid/fused video|
|US20080190007 *||Dec 9, 2004||Aug 14, 2008||Page Edward A||Precision targeting system for firearms|
|US20080245966 *||May 18, 2005||Oct 9, 2008||Lockheed Martin Corporation||Long-wavelength infra-red night vision goggles|
|US20080290278 *||May 15, 2008||Nov 27, 2008||Uni-Pixel Displays, Inc.||Visible plus non-visible field sequential color|
|US20080297885 *||Jan 4, 2008||Dec 4, 2008||Eugene Pochapsky||Dual band night vision device|
|US20090193704 *||Jul 28, 2008||Aug 6, 2009||Eugene Pochapsky||Night sight and method of making the same|
|US20090262129 *||Apr 9, 2009||Oct 22, 2009||Uni-Pixel Displays, Inc.||Extending the gamut color generation in a display|
|US20090278929 *||May 6, 2008||Nov 12, 2009||Flir Systems Inc||Video camera with interchangable optical sensors|
|US20100085432 *||Aug 31, 2009||Apr 8, 2010||Xenonics, Inc.||Portable device for viewing and imaging|
|US20110067288 *||May 8, 2009||Mar 24, 2011||Hakan Hakansson||Combination sight|
|US20110113671 *||Nov 9, 2010||May 19, 2011||Pochapsky Eugene J||Night sight and method of making the same|
|US20110141223 *||Jun 11, 2009||Jun 16, 2011||Raytheon Company||Multiple Operating Mode Optical Instrument|
|US20150172569 *||Feb 27, 2015||Jun 18, 2015||Omnitech Partners, Inc.||Apparatus and method for multi-spectral clip-on architecture|
|US20160370148 *||Jun 24, 2016||Dec 22, 2016||Umarex Usa, Inc.||Method and system for aligning a point of aim with a point of impact for a projectile device|
|EP0658788A2 *||Nov 23, 1994||Jun 21, 1995||CelsiusTech Electronics AB||Sight|
|EP0658788A3 *||Nov 23, 1994||Mar 13, 1996||Celsiustech Electronics Ab||Sight.|
|EP1018142A1 *||Jul 15, 1998||Jul 12, 2000||Litton Systems, Inc.||Multi-function day/night observation, ranging, and sighting device|
|EP1018142B1 *||Jul 15, 1998||Jan 3, 2007||Litton Systems, Inc.||Multi-function day/night observation, ranging, and sighting device|
|EP1056270A2 *||May 22, 2000||Nov 29, 2000||Hewlett-Packard Company||Digital camera system and method for displaying images via an optical viewfinder|
|EP1056270A3 *||May 22, 2000||Jun 26, 2002||Hewlett-Packard Company, A Delaware Corporation||Digital camera system and method for displaying images via an optical viewfinder|
|EP1269745A1 †||Feb 20, 2001||Jan 2, 2003||Litton Systems, Inc.||Method and system for combining multi-spectral images|
|EP1269745B2 †||Feb 20, 2001||Apr 17, 2013||L-3 Communications Corporation||Method and system for combining multi-spectral images|
|EP1724623A1 *||May 17, 2006||Nov 22, 2006||Lockheed Martin Corporation||Long-wavelength infra-red night vision goggles|
|EP2276050A2||Jan 26, 1999||Jan 19, 2011||L-3 Communications Corporation||Multi-function observation, ranging, and sighting device|
|WO1997036202A1 *||Mar 20, 1997||Oct 2, 1997||Celsiustech Electronics Ab||Sight comprising ir camera and having a large observation area|
|WO1999005473A1||Jul 15, 1998||Feb 4, 1999||Litton Systems, Inc.||Integrated night vision device and laser ranger|
|WO1999005557A1 *||Jul 15, 1998||Feb 4, 1999||Litton Systems, Inc.||Multi-function day/night observation, ranging, and sighting device|
|WO1999060787A1 *||May 17, 1999||Nov 25, 1999||Litton Systems, Inc.||Night viewer and laser range finder|
|WO2000017694A1 *||Aug 19, 1999||Mar 30, 2000||Raytheon Company||Integrated multifunctional multispectral sight assembly and method|
|WO2000022379A1 *||Sep 14, 1999||Apr 20, 2000||Litton Systems, Inc.||Night vision device with laser range finder|
|WO2001072033A1 *||Feb 20, 2001||Sep 27, 2001||Litton Systems, Inc.||Method and system for combining multi-spectral images|
|WO2003104877A1||May 30, 2003||Dec 18, 2003||Litton Systems, Inc.||Enhanced night vision goggle assembly|
|WO2006036464A2 *||Sep 1, 2005||Apr 6, 2006||United International Engineering, Inc.||Compact integrated self contained surveillance unit|
|WO2006036464A3 *||Sep 1, 2005||Jun 15, 2006||United Internat Engineering In||Compact integrated self contained surveillance unit|
|WO2006135737A2 *||Jun 9, 2006||Dec 21, 2006||Omnitech Partners||Dual band night vision device|
|WO2006135737A3 *||Jun 9, 2006||Jul 12, 2007||Omnitech Partners||Dual band night vision device|
|WO2009152411A1 *||Jun 12, 2009||Dec 17, 2009||Raytheon Company||Multiple operating mode optical instrument|
|WO2013102868A1 *||Jan 3, 2013||Jul 11, 2013||Aselsan Elektronik Sanayi Ve Ticaret Anonim Sirketi||A night vision sighting device with a single-piece body|
|U.S. Classification||359/350, 42/114, 250/339.02, 250/333, 250/339.05, 359/356|
|International Classification||F41G1/387, G02B23/12, F41G11/00|
|Cooperative Classification||F41G1/345, G02B23/12, F41G11/001|
|European Classification||G02B23/12, F41G11/00B|
|Jul 16, 1990||AS||Assignment|
Owner name: UNITED STATES OF AMERICA, THE, AS REPRESENTED BY T
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HANSEN, CHARLES L.;REEL/FRAME:005370/0884
Effective date: 19900615
|Oct 14, 1994||FPAY||Fee payment|
Year of fee payment: 4
|Feb 23, 1999||REMI||Maintenance fee reminder mailed|
|Aug 1, 1999||LAPS||Lapse for failure to pay maintenance fees|
|Oct 12, 1999||FP||Expired due to failure to pay maintenance fee|
Effective date: 19990730